Large-scale facilitation of a sessile community by an invasive habitat-forming snail

J. Thyrring, Mads Thomsen, Thomas Wernberg

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    11 Citations (Scopus)


    We provide an example of extensive facilitation of a sessile community throughout an invaded estuary by the invasive snail Batillaria australis. We show that B. australis greatly increases a limiting resource (attachment space) to a community of sessile organisms and estimate that a large part of the invaded estuary now contain ca. 50 times more sessile individuals associated with the invader than all native snails combined. We argue that native snails are unlikely to have been dramatically reduced by the invader, and we therefore suggest that the shell-attached sessile community, as a functional group, has benefitted significantly from this invasion. These results expand the current understanding of how invaded marine systems respond to habitat-forming invaders. © 2013 Springer-Verlag Berlin Heidelberg and AWI.
    Original languageEnglish
    Pages (from-to)789-794
    JournalHelgoland Marine Research
    Issue number4
    Publication statusPublished - 2013


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